Catalysis Letters

, Volume 5, Issue 1, pp 25–33 | Cite as

Analysis of EXAFS data on bimetallic clusters

  • G. H. Via
  • K. F. DrakeJr.
  • G. Meitzner
  • F. W. Lytle
  • J. H. Sinfelt
Article

Abstract

In previous studies of the structures of bimetallic clusters using extended X-ray absorption fine structure (EXAFS), structural parameters were determined by fitting the single scattering expression for EXAFS to experimental data associated with an absorption edge of each component. The data for the two edges were fitted separately. Recently, with an extensive modification of the computer program for the analysis of EXAFS data, it has been possible to fit the EXAFS data for the two edges simultaneously. This improved method of analysis has the feature thatall of the EXAFS data are used in the determination ofall of the structural parameters, and permits one to impose in a direct manner certain necessary physical conditions regarding the system. Consequently, one has greater confidence in the values obtained for the parameters. The present paper first summarizes published results obtained by the previous method of analysis on a number of systems. For comparison, a summary is then given of results obtained from the same data on these systems with the new method of analysis.

Bimetallic clusters

(i) structure of (ii) segregation of components (iii) EXAFS studies of (iv) coordination numbers (v) interatomic distances EXAFS analysis of EXAFS data X-ray absorption coefficient 

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Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1990

Authors and Affiliations

  • G. H. Via
    • 1
  • K. F. DrakeJr.
    • 1
  • G. Meitzner
    • 1
  • F. W. Lytle
    • 1
    • 2
  • J. H. Sinfelt
    • 1
  1. 1.Corporate Research LaboratoriesExxon Research and Engineering CoAnnandaleUSA
  2. 2.The Boeing CompanySeattle

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